dotnet-skills

In the author's own words, from each skill's SKILL.md — showing the first 30 of 37 files.

• akka-net-aspire-configuration

  Configure Akka.NET with .NET Aspire for local development and production deployments. Covers actor system setup, clustering, persistence, Akka.Management integration, and Aspire orchestration patterns.

  skills/akka-aspire-configuration/SKILL.md on GitHub (opens in a new tab)

• akka-net-best-practices

  Critical Akka.NET best practices including EventStream vs DistributedPubSub, supervision strategies, error handling, Props vs DependencyResolver, work distribution patterns, and cluster/local mode abstractions for testability.

  skills/akka-best-practices/SKILL.md on GitHub (opens in a new tab)

• akka-hosting-actor-patterns

  Patterns for building entity actors with Akka.Hosting - GenericChildPerEntityParent, message extractors, cluster sharding abstraction, akka-reminders, and ITimeProvider. Supports both local testing and clustered production modes.

  skills/akka-hosting-actor-patterns/SKILL.md on GitHub (opens in a new tab)

• akka-net-management

  Akka.Management for cluster bootstrapping, service discovery (Kubernetes, Azure, Config), health checks, and dynamic cluster formation without static seed nodes.

  skills/akka-management/SKILL.md on GitHub (opens in a new tab)

• akka-net-testing-patterns

  Write unit and integration tests for Akka.NET actors using modern Akka.Hosting.TestKit patterns. Covers dependency injection, TestProbes, persistence testing, and actor interaction verification. Includes guidance on when to use traditional TestKit.

  skills/akka-testing-patterns/SKILL.md on GitHub (opens in a new tab)

• aot-trimming

  Guidelines for making .NET libraries and applications trimming-safe and Native AOT compatible. Covers the trimming/AOT model, the MSBuild properties that enable analysis (IsTrimmable, IsAotCompatible, PublishTrimmed, PublishAot), the trimming attributes (RequiresUnreferencedCode, RequiresDynamicCode, DynamicallyAccessedMembers, UnconditionalSuppressMessage), IL2xxx/IL3xxx warning codes, and a pat…

  skills/aot-trimming/SKILL.md on GitHub (opens in a new tab)

• aspire-configuration

  Configure Aspire AppHost to emit explicit app config via environment variables; keep app code free of Aspire clients and service discovery.

  skills/aspire-configuration/SKILL.md on GitHub (opens in a new tab)

• aspire-integration-testing

  Write integration tests using .NET Aspire's testing facilities with xUnit. Covers test fixtures, distributed application setup, endpoint discovery, and patterns for testing ASP.NET Core apps with real dependencies.

  skills/aspire-integration-testing/SKILL.md on GitHub (opens in a new tab)

• mailpit-integration

  Test email sending locally using Mailpit with .NET Aspire. Captures all outgoing emails without sending them. View rendered HTML, inspect headers, and verify delivery in integration tests.

  skills/aspire-mailpit-integration/SKILL.md on GitHub (opens in a new tab)

• aspire-service-defaults

  Create a shared ServiceDefaults project for Aspire applications. Centralizes OpenTelemetry, health checks, resilience, and service discovery configuration across all services.

  skills/aspire-service-defaults/SKILL.md on GitHub (opens in a new tab)

• crap-analysis

  Analyze code coverage and CRAP (Change Risk Anti-Patterns) scores to identify high-risk code. Use OpenCover format with ReportGenerator for Risk Hotspots showing cyclomatic complexity and untested code paths.

  skills/crap-analysis/SKILL.md on GitHub (opens in a new tab)

• api-design

  Design stable, compatible public APIs using extend-only design principles. Manage API compatibility, wire compatibility, and versioning for NuGet packages and distributed systems.

  skills/csharp-api-design/SKILL.md on GitHub (opens in a new tab)

• modern-csharp-coding-standards

  Write modern, high-performance C# code using records, pattern matching, value objects, async/await, Span<T>/Memory<T>, and best-practice API design patterns. Emphasizes functional-style programming with C# 12+ features.

  skills/csharp-coding-standards/SKILL.md on GitHub (opens in a new tab)

• csharp-concurrency-patterns

  Choosing the right concurrency abstraction in .NET - from async/await for I/O to Channels for producer/consumer to Akka.NET for stateful entity management. Avoid locks and manual synchronization unless absolutely necessary.

  skills/csharp-concurrency-patterns/SKILL.md on GitHub (opens in a new tab)

• csharp-nullable-reference-types

  Guidelines for introducing and using nullable reference types (NRT) and System.Diagnostics.CodeAnalysis nullable attributes in C# / .NET codebases. Covers the nullability model, flow analysis, the null-forgiving operator, API design rules, the full attribute catalog (AllowNull, DisallowNull, MaybeNull, NotNull, NotNullWhen, MaybeNullWhen, NotNullIfNotNull, MemberNotNull, MemberNotNullWhen, DoesNo…

  skills/csharp-nullable-reference-types/SKILL.md on GitHub (opens in a new tab)

• type-design-performance

  Design .NET types for performance. Seal classes, use readonly structs, prefer static pure functions, avoid premature enumeration, and choose the right collection types.

  skills/csharp-type-design-performance/SKILL.md on GitHub (opens in a new tab)

• database-performance

  Database access patterns for performance. Separate read/write models, avoid N+1 queries, use AsNoTracking, apply row limits, and never do application-side joins. Works with EF Core and Dapper.

  skills/database-performance/SKILL.md on GitHub (opens in a new tab)

• dotnet-devcert-trust

  Diagnose and fix .NET HTTPS dev certificate trust issues on Linux. Covers the full certificate lifecycle from generation to system CA bundle inclusion, with distro-specific guidance for Ubuntu, Fedora, Arch, and WSL2.

  skills/dotnet-devcert-trust/SKILL.md on GitHub (opens in a new tab)

• efcore-patterns

  Entity Framework Core best practices including NoTracking by default, query splitting for navigation collections, migration management, dedicated migration services, and common pitfalls to avoid.

  skills/efcore-patterns/SKILL.md on GitHub (opens in a new tab)

• ilspy-decompile

  Understand implementation details of .NET code by decompiling assemblies. Use when you want to see how a .NET API works internally, inspect NuGet package source, view framework implementation, or understand compiled .NET binaries.

  skills/ilspy-decompile/SKILL.md on GitHub (opens in a new tab)

• dotnet-local-tools

  Managing local .NET tools with dotnet-tools.json for consistent tooling across development environments and CI/CD pipelines.

  skills/local-tools/SKILL.md on GitHub (opens in a new tab)

• marketplace-publishing

  Workflow for publishing skills and agents to the dotnet-skills Claude Code marketplace. Covers adding new content, updating plugin.json, validation, and release tagging.

  skills/marketplace-publishing/SKILL.md on GitHub (opens in a new tab)

• microsoft-extensions-configuration

  Microsoft.Extensions.Options patterns including IValidateOptions, strongly-typed settings, validation on startup, and the Options pattern for clean configuration management.

  skills/microsoft-extensions-configuration/SKILL.md on GitHub (opens in a new tab)

• dependency-injection-patterns

  Organize DI registrations using IServiceCollection extension methods. Group related services into composable Add* methods for clean Program.cs and reusable configuration in tests.

  skills/microsoft-extensions-dependency-injection/SKILL.md on GitHub (opens in a new tab)

• mjml-email-templates

  Build responsive email templates using MJML markup language. Compiles to cross-client HTML that works in Outlook, Gmail, and Apple Mail. Includes template renderer, layout patterns, and variable substitution.

  skills/mjml-email-templates/SKILL.md on GitHub (opens in a new tab)

• opentelemetry-net-instrumentation

  Provides guidance for implementing OpenTelemetry instrumentation in .NET codebases, covering tracing (Activities/Spans), metrics, logs, naming conventions, error handling, performance, SDK setup, resources, context propagation, and API design best practices.

  skills/opentelementry-dotnet-instrumentation/SKILL.md on GitHub (opens in a new tab)

• package-management

  Manage NuGet packages using Central Package Management (CPM) and dotnet CLI commands. Never edit XML directly - use dotnet add/remove/list commands. Use shared version variables for related packages.

  skills/package-management/SKILL.md on GitHub (opens in a new tab)

• playwright-blazor-testing

  Write UI tests for Blazor applications (Server or WebAssembly) using Playwright. Covers navigation, interaction, authentication, selectors, and common Blazor-specific patterns.

  skills/playwright-blazor/SKILL.md on GitHub (opens in a new tab)

• playwright-ci-caching

  Cache Playwright browser binaries in CI/CD pipelines (GitHub Actions, Azure DevOps) to avoid 1-2 minute download overhead on every build.

  skills/playwright-ci-caching/SKILL.md on GitHub (opens in a new tab)

• dotnet-project-structure

  Modern .NET project structure including .slnx solution format, Directory.Build.props, central package management, SourceLink, version management with RELEASE_NOTES.md, and SDK pinning with global.json.

  skills/project-structure/SKILL.md on GitHub (opens in a new tab)

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